实Banach空间中一致L-Lipschitzian 渐近半压缩映象具误差的迭代序列的收敛性

讨论了任意实Banach空间中一致L-Lipschitian渐近半压缩映象的不动点的具误差的Ishikawa迭代序列的逼近问题,所得结果是Sun Zhaohong等人的最近结果的改进和推广。     

一类3种群相互作用的系统平衡位置的稳定性

研究了3种群相互作用构成的群落的Volterra模型,利用特征值法讨论正平衡点M的局部渐进稳定性,得到一个充要条件;同时构造V函数得到M点全局稳定的充分条件.     

基于SQL server复制方法的数据库同步软件研究

在稳定性不好的网络环境下利用SQL server数据库的复制功能进行数据同步容易造成数据的不一致性。本文研究了一个基于SQL server复制方法和压缩技术的数据库同步软件DataSend的设计与应用。DataSend通过建设中间层缓解了源数据库和目标数据库的压力,对传输数据进行压缩处理后再传输;通过状态来控制传输的准确性,从而提高了数据同步的传输效率、灵活性、安全性和准确性。     

ROBUST OUTPUT FEEDBACK GUARANTEED COST CONTROL FOR 2‐D UNCERTAIN STATE‐DELAYED SYSTEMS

This paper considers the robust guaranteed cost control problem of two‐dimensional (2‐D) state‐delayed systems. First, the definition of guaranteed cost matrix is proposed and an upper bound of the cost function is given. Then, the guaranteed cost control problem is resolved. Furthermore, the minimum upper bound of the closed‐loop cost function is obtained by solving an optimization problem with LMIs' constraints. A numerical example demonstrates the effectiveness of our results.     

可识别载波的红外遥控自学习模块研究与设计

介绍了一种红外遥控自学习模块,采用波形复制方法来实现红外遥控信号的载波识别与波形学习。该模块以STC12C5410AD单片机为核心设计,通过单片机的外部中断与定时器的配合使用,实现红外遥控信号的载波识别与波形学习。经过实际测试,该模块能准确学习红外遥控信号的波形,并能准确控制红外设备,具有良好的通用性和宽载波学习范围,可适用于万能遥控和智能家居系统。     

遗传算法在旅行商问题的研究与应用

旅行商问题（TSP）是一类典型的非确定性多项式（NP）完全组合优化问题.针对基本遗传算法在求解这类问题时容易出现局部收敛现象,提出了改进,采用轮盘赌和优秀个体复制相结合的方法进行选择,对11个城市的旅行商问题进行研究,通过比较发现取得良好的收敛,该方法在解决很多NP完全组合优化问题上同样适用.     

Coarse‐to‐Fine Isometric Shape Correspondence by Tracking Symmetric Flips

We address the symmetric flip problem that is inherent to multi‐resolution isometric shape matching algorithms. To this effect, we extend our previous work which handles the dense isometric correspondence problem in the original 3D Euclidean space via coarse‐to‐fine combinatorial matching. The key idea is based on keeping track of all optimal solutions, which may be more than one due to symmetry especially at coarse levels, throughout denser levels of the shape matching process. We compare the resulting dense correspondence algorithm with state‐of‐the‐art techniques over several 3D shape benchmark datasets. The experiments show that our method, which is fast and scalable, is performance‐wise better than or on a par with the best performant algorithms existing in the literature for isometric (or nearly isometric) shape correspondence. Our key idea of tracking symmetric flips can be considered as a meta‐approach that can be applied to other multi‐resolution shape matching algorithms, as we also demonstrate by experiments.     

Global asymptotical synchronisation in linearly coupled networks of RCL-shunted Josephson junctions

This article presents the synchronisation criteria for a class of dynamical networks with each node being resistively-capacitively-inductively-shunted (RCL-shunted) Josephson junction, which guarantee the synchronised states to be global asymptotically stable. These conditions are established in terms of linear matrix inequalities (LMIs), readily solvable by available numerical software. In addition, an interesting conclusion is reached that the stability of synchronisation in the coupled whole 3N-dimensional networks can be converted into that of 3-dimensional space.     

Banach空间中具误差的Reich-Takahashi迭代序列的强收敛性

本文在具一致Gteaux可微范数的Banach空间的框架下,得出了第一型和第二型修正的具误差的Reich-Takahashi迭代序列强收敛于非自渐近非扩张映象的不动点的充分必要条件。所得结果改进和推广了已有相关结果。     

煤矿用高水无机膨胀充填材料泌水分析表征

通过化学方法检测分析了榆阳煤矿高水无机充填材料的泌水组分，分析确定硫酸根离子的浓度为1344mg／L；红外分析发现，溶液中含有机物量少，且都是对人体无害的水泥添加剂组分；原子吸收光谱检测钙、镁离子、硅酸根浓度，其中硅酸根和钙离子超出了仪器的检测范围，即〉1000mg／L，Mg2＋含量为362mg／L。综合检测分析发现，充填泌水主要为高水充填材料中的石膏、水泥、粉煤灰、水泥外加剂等可溶成分。